Lamp-socket lock.



H.R.LAND.

LAMP SGCKET LOCK. v

APPLICATION FILED me. H. I917.

L wo Patented May15,191?.

INVENTOR jflrer?fllamaz ATTORNEYS as, that HERBERT n. L, on LITTLE noon,eases.

' LAMP-SOCKET LOCK.

To all whom it may concern: Be it known that I, HERBERT R. LAND,residing at Little Rock, Pulaski and State of Arkansas, have ina venteda new andflmproved Lamp-Socket Look, of which; the following. is aspecification.. 7

My invention has reference to means for locking electric light lampsthat is especially 1) designed for securely holding the lamp in itssocket against working loose and partially or wholly breaking the lightcircuit and .also to prevent the lamp from being stolen. I

My invention 'has for its. object to pro vide a device oi -the characterstated of a simpleand economical construction, in which is included ascrew pin having a pointed end adapted for-being forced against themetal neck on the lamp globe and in such manner that-thelamp cannot bereadily unscrewed from the socket or work loose under ordinaryconditions.

other purpose of my invention is to as provide a lamp socket lock thatmay be read ily applied.to the conventional forms of lamp sockets andwhich leaves no projection or other external formation on the socketthat might interfere with the ordinary manaa ner of cleaning the socketor the lamp and- K the use of shades on the globe.

y invention is a lamp socket lock that embodies the peculiar features ofconstruction and novel arrangement of the parts willbe hereinafterdescribed, specifically pointed out in the appended claims andillustrated in the accompanying drawing, in which 'Figure 1 is aperspective view of an. in-

candescent lamp with an attached socket provided with my improved socketlock.

Fig. 2 is a vertical section of the lamp and the socket connection andthe socket'lock, the latter being adjusted for as lamp from beingsocket.

Fig. 3 is a similar freely unscrewed from the view that illustrates thelock device adjusted to permit of the free removal of the lamp, and

Soul Fig. 4 is a perspective view of the several parts that constitutemy invention, the said r parts being shown separated.

In the practicalshowing of my invention, 1 designates an ordinaryincandescent lamp 5 and 2 the conventional type of socket which iSpecification of Letters Patent. Application filed January 11, 1917.Serial 1%. 141,819.

in the county of a flange bearing that holding the ,point\82 will withthe drawing, the complete Patented May 15, im a.

includes the internal screw and the insulating sleeve 4.

y device includes a ring or sleeve 5 of suitable insulating material,preferably hard threaded liner 3 rubber, and.of alength equal the lengthof an aperturefi that is drilled through the insulating sleeve 4;. andthe outer metal socket shell 7.

8- designates ashort tubular hub that snugly fits within the sleeve 5and which, in 61 practice, is formed by cutting down an ordinary woodscrew, the head of which forms seats against the inner side of theinsulating sleeve 4.- when the said plug or hub 8is fit in the aperture6 and to thereby hold the device from working out through the saidapertures 6.

The hub 8 is formed with an internal thread 80, provided for receiving ascrew pin 9, the inner end of which is turned down to form a sharppenetrating point 82 and ,the outer end of which is formed with asquared key receiving tap 81, the head of which, when the parts areoperatively assembled, lies back of the outer end of the hub 8, thelatter, when the parts are applied; being flush with the outer surfaceof the socket shell, see Fig.- 2.

' By reason of forming the screw pin and the threaded hub in the mannershown, the 35 said hub, which fills the aperture, 6 through 2 the socketand shell and the sleeve 4, is held" from working inwardly and loose bythe threaded liner with which 91c head 83 of the said hub 8 engages, as1s shown in the W said Fi 2, by reference" to which, it will be also(iserved that the liner 3 has an aperture 60 which alines thefaperture 6and provides for projecting the pointed end 82 of the screw pin upagainst the threaded rim 95 of the lamp bulb, it being understood that.as the pin 9 is' screwed home by applying a suitable implement to itstap 81, the sharp become suficiently indented in the said lamp bulbrimto hold the lamp se- 00 curely locked against being unscrewed orbecoming loosened imder ordinary usage.

From the foregoing taken in connection construction, the manner of theappllcation thereof 10! and the advantages of my invention will bereadily apparent to those skilled in the art to which it appertains.

In applying my socket lock device to the conventional forms of lampsockets, 'it is 1 only side the socket necessary to provide an aperture60 in the liner that is sufliciently large to permit slipping thecomplete with the insulating sleeve and the attached parts projectedthrough an aperture 6 drilled in the socket shell, the

' shell in any suitable manner.

What I claim 1s: 1. In combination lamp and socket or insulating sleevemounted in the socket with an incandescent shell with its outer endflush with the outer end of the pin being shaped for receiving asuitable turning implement.

'2. The combinationwith an incandescent article from ininsulating sleevebeing made fast to the holder therefor; of an' sulator sleeve beingadapted for tightl;

the inner end that extends anda socket-or holder therefor, the latterincluding a threaded liner and an insulating sleeve that is locatedbetween the liner and the socket shell, the said sleeve and the socketshell having alining apertures, the liner having an aperture of largerdiameter than the apertures in the sleeve and shell;'of a locking deviceconsisting of an insulator sleeve and tubular hub that passes throughand is fixedly attached to the sleeve and which includes an annularlyenlarged head portion at the inner end,- the said inlamp ting in theapertures in the socket shel and the socket insulating sleeve, the saiddevice being insertible through the aperture in the socket liner, thesaid hub having an internal bore and a screw pin engaging the said screwthreaded bore, the shar penetrating point for engaging the meta threadedend of the lamp and a headed portionfor receiving a' suitable tumingtool.

HERBERT R. LAND.

said pin having a.

